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Synthesis and Testing of Supported Pt-Cu Solid Solution Nanoparticle Catalysts for Propane Dehydrogenation
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Hidrogenación altamente activa y selectiva de CO2 a etanol por nanopartículas ordenadas de Pd-Cu
Shuxing Bai1, Qi Shao1, Pengtang Wang1
1College of Chemistry, Chemical Engineering and Materials Science, Soochow University , Jiangsu 215123, China.
Journal of the American Chemical Society
|May 10, 2017
Resumen
Las nanopartículas de pallado-cobre de alto orden convierten eficientemente el dióxido de carbono (CO2) en etanol (C2H5OH). Este proceso catalítico optimizado ofrece una solución prometedora para los desafíos de utilización de CO2.
Área de la Ciencia:
- Catálisis
- Ciencias de los materiales
- Química ecológica
Sus antecedentes:
- La conversión de dióxido de carbono (CO2) en sustancias químicas valiosas es crucial para la sostenibilidad.
- La producción de etanol (C2H5OH) mediante hidrogenación con CO2 es una vía prometedora pero difícil.
- El desarrollo de catalizadores eficientes para la hidrogenación del CO2 es esencial para la utilización del CO2.
Objetivo del estudio:
- Desarrollar catalizadores altamente activos, selectivos y estables para la hidrogenación de CO2 en etanol.
- Optimizar el rendimiento catalítico ajustando la composición de las nanopartículas y los materiales de soporte.
- Para aclarar el mecanismo de reacción para la producción de etanol mejorada.
Principales métodos:
- Síntesis de nanopartículas de paladio-cobre (Pd-Cu) muy ordenadas (NPs).
- Ajuste de la composición de Pd-Cu NPs y soportes de catalizadores (por ejemplo, P25).
- Caracterización mediante la espectroscopia de la transformación de Fourier de reflexión difusa en el infrarrojo (DRIFTS).
Principales resultados:
- Los Pd-Cu NP demostraron una alta actividad, selectividad y estabilidad para la hidrogenación de CO2 a C2H5OH.
- El catalizador Pd2Cu NPs/P25 optimizado logró una selectividad del 92,0% para el C2H5OH.
- La frecuencia de rotación más alta (TOF) alcanzó 359,0 h−1.
- Las corrientes revelaron el aumento de la hidrogenación de *CO a *HCO como el paso determinante de la velocidad.
Conclusiones:
- Las NP Pd-Cu de alto orden son catalizadores eficaces para la hidrogenación del CO2 en etanol.
- La composición y el soporte del catalizador juegan un papel fundamental en la optimización de la eficiencia.
- El rendimiento mejorado se atribuye a la mejora de la hidrogenación del CO adsorbido en *HCO.
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